Datrys 8/sqrt{12^{2+8^2+16^2+8^2+16^2}}=

$$\frac { 8 } { \sqrt { 12 ^ { 2 } + 8 ^ { 2 } + 16 ^ { 2 } + 8 ^ { 2 } + 16 ^ { 2 } } } =$$

Enrhifo

$$\frac{2}{7}\approx 0.285714286$$

Camau Ateb

Cyfrifo 12 i bŵer 2 a chael 144.

$$\frac{8}{\sqrt{144+8^{2}+16^{2}+8^{2}+16^{2}}}$$

Cyfrifo 8 i bŵer 2 a chael 64.

$$\frac{8}{\sqrt{144+64+16^{2}+8^{2}+16^{2}}}$$

Adio 144 a 64 i gael 208.

$$\frac{8}{\sqrt{208+16^{2}+8^{2}+16^{2}}}$$

Cyfrifo 16 i bŵer 2 a chael 256.

$$\frac{8}{\sqrt{208+256+8^{2}+16^{2}}}$$

Adio 208 a 256 i gael 464.

$$\frac{8}{\sqrt{464+8^{2}+16^{2}}}$$

Cyfrifo 8 i bŵer 2 a chael 64.

$$\frac{8}{\sqrt{464+64+16^{2}}}$$

Adio 464 a 64 i gael 528.

$$\frac{8}{\sqrt{528+16^{2}}}$$

Cyfrifo 16 i bŵer 2 a chael 256.

$$\frac{8}{\sqrt{528+256}}$$

Adio 528 a 256 i gael 784.

$$\frac{8}{\sqrt{784}}$$

Cyfrifo ail isradd 784 a chael 28.

$$\frac{8}{28}$$

Lleihau'r ffracsiwn \frac{8}{28} i'r graddau lleiaf posib drwy dynnu a chanslo allan 4.

$$\frac{2}{7}$$

Ffactor

$$\frac{2}{7} = 0.2857142857142857$$